All of the following statements are true EXCEPT: A) catalytic converters can become plugged if they operate for a prolonged period when there is a misfire. B) as a general rule, exhaust backpressure should not exceed 3.75 psi at wide-open throttle (WOT) under full load. C) a rich air-fuel mixture can result in a plugged converter when it overheats and melts internally. D) exhaust backpressure can be tested by removing the oxygen (O₂) sensor and connecting a pressure tester using a special fitting.

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The Answer of All of the following statements are true EXCEPT: A) catalytic converters can become plugged if they operate for a prolonged period when there is a misfire. B) as a general rule, exhaust backpressure should not exceed 3.75 psi at wide-open throttle (WOT) under full load. C) a rich air-fuel mixture can result in a plugged converter when it overheats and melts internally. D) exhaust backpressure can be tested by removing the oxygen (O₂) sensor and connecting a pressure tester using a special fitting.

All of the Following Statements Are True EXCEPT